bpf/prog_tests/xdp_adjust_frags.c

12 	__u8 *buf;
26 	buf = malloc(128);
27 	if (!ASSERT_OK_PTR(buf, "alloc buf 128b"))
30 	memset(buf, 0, 128);
31 	offset = (__u32 *)buf;
33 	buf[*offset] = 0xaa;		/* marker at offset 16 (head) */
34 	buf[*offset + 15] = 0xaa;	/* marker at offset 31 (head) */
36 	topts.data_in = buf;
37 	topts.data_out = buf;
43 	/* test_xdp_update_frags: buf[16,31]: 0xaa -> 0xbb */
46 	ASSERT_EQ(buf[16], 0xbb, "xdp_update_frag buf[16]");
47 	ASSERT_EQ(buf[31], 0xbb, "xdp_update_frag buf[31]");
49 	free(buf);
51 	buf = malloc(9000);
52 	if (!ASSERT_OK_PTR(buf, "alloc buf 9Kb"))
55 	memset(buf, 0, 9000);
56 	offset = (__u32 *)buf;
58 	buf[*offset] = 0xaa;		/* marker at offset 5000 (frag0) */
59 	buf[*offset + 15] = 0xaa;	/* marker at offset 5015 (frag0) */
61 	topts.data_in = buf;
62 	topts.data_out = buf;
68 	/* test_xdp_update_frags: buf[5000,5015]: 0xaa -> 0xbb */
71 	ASSERT_EQ(buf[5000], 0xbb, "xdp_update_frag buf[5000]");
72 	ASSERT_EQ(buf[5015], 0xbb, "xdp_update_frag buf[5015]");
74 	memset(buf, 0, 9000);
75 	offset = (__u32 *)buf;
77 	buf[*offset] = 0xaa;		/* marker at offset 3510 (head) */
78 	buf[*offset + 15] = 0xaa;	/* marker at offset 3525 (frag0) */
82 	/* test_xdp_update_frags: buf[3510,3525]: 0xaa -> 0xbb */
85 	ASSERT_EQ(buf[3510], 0xbb, "xdp_update_frag buf[3510]");
86 	ASSERT_EQ(buf[3525], 0xbb, "xdp_update_frag buf[3525]");
88 	memset(buf, 0, 9000);
89 	offset = (__u32 *)buf;
91 	buf[*offset] = 0xaa;		/* marker at offset 7606 (frag0) */
92 	buf[*offset + 15] = 0xaa;	/* marker at offset 7621 (frag1) */
96 	/* test_xdp_update_frags: buf[7606,7621]: 0xaa -> 0xbb */
99 	ASSERT_EQ(buf[7606], 0xbb, "xdp_update_frag buf[7606]");
100 	ASSERT_EQ(buf[7621], 0xbb, "xdp_update_frag buf[7621]");
102 	free(buf);
119 	buf = malloc(buf_size);
120 	if (!ASSERT_OK_PTR(buf, "alloc buf"))
123 	memset(buf, 0, buf_size);
124 	offset = (__u32 *)buf;
126 	buf[*offset] = 0xaa;
127 	buf[*offset + 15] = 0xaa;
129 	topts.data_in = buf;
130 	topts.data_out = buf;
136 		  "unsupported buf size, possible non-default /proc/sys/net/core/max_skb_flags?");
137 	free(buf);